<!doctype html>
<!--
 * Copyright 2017 The Chromium Authors. All rights reserved.  Use of this
 * source code is governed by a BSD-style license that can be found in the
 * LICENSE file.
-->
<html>
<head>
<script>
window.onmessage = function (e) {
  if(e.data == 'TEST_START') {
    e.source.postMessage('TEST_PASSED', '*');
  }
}
</script>
</head>
<body>
</body>
</html>
